<!DOCTYPE html><html lang="zh-Hans"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"><meta name="description" content="iOS绘图与动画系列 UIDynamicAnimator（五）"><meta name="keywords" content="iOS,动画,绘图"><meta name="author" content="kyren"><meta name="copyright" content="kyren"><title>iOS绘图与动画系列 UIDynamicAnimator（五） | Kyren's Blog</title><link rel="shortcut icon" href="/melody-favicon.ico"><link rel="stylesheet" href="/css/index.css?version=1.9.0"><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/font-awesome@latest/css/font-awesome.min.css?version=1.9.0"><meta name="format-detection" content="telephone=no"><meta http-equiv="x-dns-prefetch-control" content="on"><link rel="dns-prefetch" href="https://cdn.jsdelivr.net"><link rel="dns-prefetch" href="https://hm.baidu.com"><script>var _hmt = _hmt || [];
(function() {
  var hm = document.createElement("script");
  hm.src = "https://hm.baidu.com/hm.js?cf87fcdbd9ab7cf93d894f7c219ae78f";
  var s = document.getElementsByTagName("script")[0]; 
  s.parentNode.insertBefore(hm, s);
})();</script><meta http-equiv="Cache-Control" content="no-transform"><meta http-equiv="Cache-Control" content="no-siteapp"><script src="https://v1.hitokoto.cn/?encode=js&amp;charset=utf-8&amp;select=.footer_custom_text" defer></script><script>var GLOBAL_CONFIG = { 
  root: '/',
  algolia: undefined,
  localSearch: {"path":"search.xml","languages":{"hits_empty":"找不到您查询的内容:${query}"}},
  copy: {
    success: '复制成功',
    error: '复制错误',
    noSupport: '浏览器不支持'
  },
  hexoVersion: '6.2.0'
} </script><meta name="generator" content="Hexo 6.2.0"></head><body><i class="fa fa-arrow-right" id="toggle-sidebar" aria-hidden="true"></i><div id="sidebar" data-display="true"><div class="toggle-sidebar-info text-center"><span data-toggle="切换文章详情">切换站点概览</span><hr></div><div class="sidebar-toc"><div class="sidebar-toc__title">目录</div><div class="sidebar-toc__progress"><span class="progress-notice">你已经读了</span><span class="progress-num">0</span><span class="progress-percentage">%</span><div class="sidebar-toc__progress-bar"></div></div><div class="sidebar-toc__content"><ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#%E5%85%B3%E9%94%AE%E7%B1%BB"><span class="toc-number">1.</span> <span class="toc-text">关键类</span></a></li></ol></div></div><div class="author-info hide"><div class="author-info__avatar text-center"><img src="https://avatars.githubusercontent.com/u/5827823?v=4"></div><div class="author-info__name text-center">kyren</div><div class="author-info__description text-center">huluo的技术博客</div><div class="follow-button"><a target="_blank" rel="noopener" href="https://github.com/huluo666">Follow Me</a></div><hr><div class="author-info-articles"><a class="author-info-articles__archives article-meta" href="/archives"><span class="pull-left">文章</span><span class="pull-right">239</span></a><a class="author-info-articles__tags article-meta" href="/tags"><span class="pull-left">标签</span><span class="pull-right">41</span></a><a class="author-info-articles__categories article-meta" href="/categories"><span class="pull-left">分类</span><span class="pull-right">29</span></a></div><hr><div class="author-info-links"><div class="author-info-links__title text-center">Links</div><a class="author-info-links__name text-center" target="_blank" rel="noopener" href="http://192.168.2.212:9090/">Jira</a><a class="author-info-links__name text-center" target="_blank" rel="noopener" href="http://192.168.2.212:8090/">Confluence</a><a class="author-info-links__name text-center" target="_blank" rel="noopener" href="http://bloc.leniugame.com/">Leniu</a></div></div></div><div id="content-outer"><div class="no-bg" id="top-container"><div id="page-header"><span class="pull-left"> <a id="site-name" href="/">Kyren's Blog</a></span><i class="fa fa-bars toggle-menu pull-right" aria-hidden="true"></i><span class="pull-right menus">   <a class="site-page" href="/">主页</a><a class="site-page" href="/essay">随笔</a><a class="site-page" href="/archives">归档</a><a class="site-page" href="/tags">标签</a><a class="site-page" href="/categories">分类</a><a class="site-page" href="/about">关于</a></span><span class="pull-right"><a class="site-page social-icon search"><i class="fa fa-search"></i><span> 搜索</span></a></span></div><div id="post-info"><div id="post-title">iOS绘图与动画系列 UIDynamicAnimator（五）</div><div id="post-meta"><time class="post-meta__date"><i class="fa fa-calendar" aria-hidden="true"></i> 2016-04-08</time></div></div></div><div class="layout" id="content-inner"><article id="post"><div class="article-container" id="post-content"><p>iOS 7 中推出的UIKit Dynamics，主要带来了模拟现实的二维动画效果，用来创建逼真的物理动画。</p>
<p><img src="http://7xr7vj.com1.z0.glb.clouddn.com/2016/04/12/Fna6-VRKt81gIKaqC7GujwC4Zrfi469.png"></p>
<h2 id="关键类"><a href="#关键类" class="headerlink" title="关键类"></a>关键类</h2><ul>
<li><strong><code>UIDynamicAnimator</code></strong>	封装了底层 iOS 物理引擎，为动力项（UIDynamicItem）提供物理相关的功能和动画。</li>
<li><strong><code>UIDynamicBehavior</code></strong>     动力行为，为动力项提供不同的物理行为</li>
<li><strong><code>UIDynamicItem</code></strong>              动力项，相当于现实世界中的一个基本物体</li>
</ul>
<p><code>UIDynamicAnimator</code>常用API</p>
<figure class="highlight objectivec"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br></pre></td><td class="code"><pre><span class="line"><span class="class"><span class="keyword">@interface</span> <span class="title">UIDynamicAnimator</span>: <span class="title">NSObject</span></span></span><br><span class="line"></span><br><span class="line"><span class="comment">// 传入一个 Reference view 创建一个 Dynamic Animator</span></span><br><span class="line">- (<span class="keyword">instancetype</span>)initWithReferenceView:(<span class="built_in">UIView</span> *)view;</span><br><span class="line"><span class="comment">// 添加动力行为</span></span><br><span class="line">- (<span class="type">void</span>)addBehavior:(<span class="built_in">UIDynamicBehavior</span> *)behavior;</span><br><span class="line"><span class="comment">// 删除指定的动力行为</span></span><br><span class="line">- (<span class="type">void</span>)removeBehavior:(<span class="built_in">UIDynamicBehavior</span> *)behavior;</span><br><span class="line"><span class="comment">// 删除所有的动力行为</span></span><br><span class="line">- (<span class="type">void</span>)removeAllBehaviors;</span><br><span class="line"></span><br><span class="line"><span class="comment">//关联view</span></span><br><span class="line"><span class="keyword">@property</span> (<span class="keyword">nullable</span>, <span class="keyword">nonatomic</span>, <span class="keyword">readonly</span>) <span class="built_in">UIView</span> *referenceView;</span><br><span class="line"><span class="comment">// 获取所有的 Behaviors</span></span><br><span class="line"><span class="keyword">@property</span> (<span class="keyword">nonatomic</span>, <span class="keyword">readonly</span>, <span class="keyword">copy</span>) <span class="built_in">NSArray</span>&lt;__kindof <span class="built_in">UIDynamicBehavior</span>*&gt; *behaviors;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 获取在 CGRect 内所有的动力项，这个 CGRect 是基于 Reference view 的二维坐标系统的</span></span><br><span class="line">- (<span class="built_in">NSArray</span>&lt;<span class="type">id</span>&lt;<span class="built_in">UIDynamicItem</span>&gt;&gt; *)itemsInRect:(<span class="built_in">CGRect</span>)rect;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 如果动力项不是通过 animator 自动计算改变状态，比如，通过代码强制改变一个 item 的 transfrom 时，可以用这个方法通知 animator 这个 item 的改变。如果不用这个方法，animator 之后的动画会覆盖代码中对 item 做的改变，相当于代码改变 transform 变得没有意义。</span></span><br><span class="line">- (<span class="type">void</span>)updateItemUsingCurrentState:(<span class="type">id</span> &lt;<span class="built_in">UIDynamicItem</span>&gt;)item;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 是否正在运行</span></span><br><span class="line"><span class="keyword">@property</span> (<span class="keyword">nonatomic</span>, <span class="keyword">readonly</span>, <span class="keyword">getter</span> = isRunning) <span class="type">BOOL</span> running;</span><br><span class="line"></span><br><span class="line"><span class="comment">// 已经运行了多久的时间</span></span><br><span class="line">- (<span class="built_in">NSTimeInterval</span>)elapsedTime;</span><br><span class="line"></span><br><span class="line"><span class="comment">// delegate 中有两个回调方法，一个是在 animator 暂停的时候调用，一个是在将要恢复的时候调用</span></span><br><span class="line"><span class="keyword">@property</span> (<span class="keyword">nullable</span>, <span class="keyword">nonatomic</span>, <span class="keyword">weak</span>) <span class="type">id</span> &lt;<span class="built_in">UIDynamicAnimatorDelegate</span>&gt; delegate;</span><br><span class="line"></span><br><span class="line"><span class="keyword">@end</span></span><br></pre></td></tr></table></figure>



<p><code>UIDynamicBehavior</code> 的主要方法和属性</p>
<figure class="highlight objectivec"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">// 在将要进行动画时的 block 回调</span></span><br><span class="line"><span class="keyword">@property</span>(<span class="keyword">nonatomic</span>, <span class="keyword">copy</span>) <span class="type">void</span> (^action)(<span class="type">void</span>)</span><br><span class="line"></span><br><span class="line"><span class="comment">// 添加到该动态行为中的子动态行为</span></span><br><span class="line"><span class="keyword">@property</span>(<span class="keyword">nonatomic</span>, <span class="keyword">readonly</span>, <span class="keyword">copy</span>) <span class="built_in">NSArray</span> *childBehaviors</span><br><span class="line"></span><br><span class="line"><span class="comment">//  该动态行为相关联的dynamicAnimator</span></span><br><span class="line"><span class="keyword">@property</span>(<span class="keyword">nonatomic</span>, <span class="keyword">readonly</span>) <span class="built_in">UIDynamicAnimator</span> *dynamicAnimator</span><br><span class="line"></span><br><span class="line"><span class="comment">//添加一个子动态行为</span></span><br><span class="line">- (<span class="type">void</span>)addChildBehavior:(<span class="built_in">UIDynamicBehavior</span> *)behavior</span><br><span class="line"></span><br><span class="line"><span class="comment">// 移除一个子动态行为</span></span><br><span class="line">- (<span class="type">void</span>)removeChildBehavior:(<span class="built_in">UIDynamicBehavior</span> *)behavior</span><br><span class="line"></span><br><span class="line"><span class="comment">// 当该动态行为将要被添加到一个UIDynamicAnimator中时，这个方法会被调用。</span></span><br><span class="line">- (<span class="type">void</span>)willMoveToAnimator:(<span class="built_in">UIDynamicAnimator</span> *)dynamicAnimator</span><br></pre></td></tr></table></figure>



<p><a target="_blank" rel="noopener" href="https://github.com/ZhipingYang/UIKitDynamics">https://github.com/ZhipingYang/UIKitDynamics</a></p>
<p><a target="_blank" rel="noopener" href="https://github.com/xiaofei86/UIKitDynamics">https://github.com/xiaofei86/UIKitDynamics</a></p>
<p><a target="_blank" rel="noopener" href="http://vit0.com/blog/2014/03/08/ios-7-uikit-dynamic-xue-xi-zong-jie/">http://vit0.com/blog/2014/03/08/ios-7-uikit-dynamic-xue-xi-zong-jie/</a></p>
</div></article><div class="post-copyright"><div class="post-copyright__author"><span class="post-copyright-meta">文章作者: </span><span class="post-copyright-info"><a href="mailto:undefined">kyren</a></span></div><div class="post-copyright__type"><span class="post-copyright-meta">文章链接: </span><span class="post-copyright-info"><a href="http://huluo666.gitee.io/2016/04/08/iOS绘图与动画系列 UIDynamicAnimator（五）/">http://huluo666.gitee.io/2016/04/08/iOS绘图与动画系列 UIDynamicAnimator（五）/</a></span></div><div class="post-copyright__notice"><span class="post-copyright-meta">版权声明: </span><span class="post-copyright-info">本博客所有文章除特别声明外，均采用 <a target="_blank" rel="noopener" href="https://creativecommons.org/licenses/by-nc-sa/4.0/">CC BY-NC-SA 4.0</a> 许可协议。转载请注明来自 <a href="http://huluo666.gitee.io">Kyren's Blog</a>！</span></div></div><div class="post-meta__tag-list"><a class="post-meta__tags" href="/tags/iOS-%E5%8A%A8%E7%94%BB-%E7%BB%98%E5%9B%BE/">iOS,动画,绘图</a></div><nav id="pagination"><div class="prev-post pull-left"><a href="/2016/04/08/iOS%E7%BB%98%E5%9B%BE%E4%B8%8E%E5%8A%A8%E7%94%BB%E7%B3%BB%E5%88%97%20Animation%EF%BC%88%E5%9B%9B%EF%BC%89/"><i class="fa fa-chevron-left">  </i><span>iOS绘图与动画系列 Animation（四）</span></a></div><div class="next-post pull-right"><a href="/2016/04/08/iOS%E7%BB%98%E5%9B%BE%E4%B8%8E%E5%8A%A8%E7%94%BB%E7%B3%BB%E5%88%97%20%E8%B4%9D%E5%A1%9E%E5%B0%94%E6%9B%B2%E7%BA%BFUIBezierPath%EF%BC%88%E4%BA%8C%EF%BC%89/"><span>iOS绘图与动画系列 贝塞尔曲线UIBezierPath（二）</span><i class="fa fa-chevron-right"></i></a></div></nav></div></div><footer><div class="layout" id="footer"><div class="copyright">&copy;2022 By kyren</div><div class="framework-info"><span>驱动 - </span><a target="_blank" rel="noopener" href="http://hexo.io"><span>Hexo</span></a><span class="footer-separator">|</span><span>主题 - </span><a target="_blank" rel="noopener" href="https://github.com/Molunerfinn/hexo-theme-melody"><span>Melody</span></a></div><div class="footer_custom_text">hitokoto</div><div class="busuanzi"><script async src="//busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js"></script><span id="busuanzi_container_page_pv"><i class="fa fa-file"></i><span id="busuanzi_value_page_pv"></span><span></span></span></div></div></footer><i class="fa fa-arrow-up" id="go-up" aria-hidden="true"></i><script src="https://cdn.jsdelivr.net/npm/animejs@latest/lib/anime.min.js"></script><script src="https://cdn.jsdelivr.net/npm/jquery@latest/dist/jquery.min.js"></script><script src="https://cdn.jsdelivr.net/npm/@fancyapps/fancybox@latest/dist/jquery.fancybox.min.js"></script><script src="https://cdn.jsdelivr.net/npm/velocity-animate@latest/velocity.min.js"></script><script src="https://cdn.jsdelivr.net/npm/velocity-ui-pack@latest/velocity.ui.min.js"></script><script src="/js/utils.js?version=1.9.0"></script><script src="/js/fancybox.js?version=1.9.0"></script><script src="/js/sidebar.js?version=1.9.0"></script><script src="/js/copy.js?version=1.9.0"></script><script src="/js/fireworks.js?version=1.9.0"></script><script src="/js/transition.js?version=1.9.0"></script><script src="/js/scroll.js?version=1.9.0"></script><script src="/js/head.js?version=1.9.0"></script><script src="/js/search/local-search.js"></script><script>if(/Android|webOS|iPhone|iPod|iPad|BlackBerry/i.test(navigator.userAgent)) {
  $('#nav').addClass('is-mobile')
  $('footer').addClass('is-mobile')
  $('#top-container').addClass('is-mobile')
}</script><div class="search-dialog" id="local-search"><div class="search-dialog__title" id="local-search-title">本地搜索</div><div id="local-input-panel"><div id="local-search-input"><div class="local-search-box"><input class="local-search-box--input" placeholder="搜索文章"></div></div></div><hr><div id="local-search-results"><div id="local-hits"></div><div id="local-stats"><div class="local-search-stats__hr" id="hr"><span>由</span> <a target="_blank" rel="noopener" href="https://github.com/wzpan/hexo-generator-search" style="color:#49B1F5;">hexo-generator-search</a>
 <span>提供支持</span></div></div></div><span class="search-close-button"><i class="fa fa-times"></i></span></div><div class="search-mask"></div></body></html>